This article is cited in 4 papers

Surfaces, Electron and Ion Emission

Composition of the ion current during field evaporation of some binary and ternary compounds at different temperatures

O. L. Golubev, N. M. Blashenkov, M. V. Loginov

Ioffe Institute, St. Petersburg

Abstract: Experiments on the field evaporation of emitters made of Mo-Re, Ir-Ce, and W-Re binary alloys and Hf-Mo-Re ternary compound are described. It is shown that, depending on emitter preprocessing conditions (high-temperature heating in a high electric field), either atomic ions of almost all components of the alloy with different charge types are emitted simultaneously or ions of only one component of the compound are obtained. Field emitters made of alloys or multicomponent compounds may form a basis for sources of ions differing in mass and composition with the emitter composition remaining the same. Moreover, alloys and multicomponent compounds are promising for sources of ions of such materials of which field emitters are difficult, if at all possible, to prepare.

Received: 01.06.2011

 English version: Technical Physics, 2012, 57:3, 422–426

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